vfork.S revision 217106
12088Ssos/*- 25994Ssos * Copyright (c) 1990 The Regents of the University of California. 32088Ssos * All rights reserved. 42088Ssos * 52088Ssos * This code is derived from software contributed to Berkeley by 62088Ssos * William Jolitz. 72088Ssos * 82088Ssos * Redistribution and use in source and binary forms, with or without 95994Ssos * modification, are permitted provided that the following conditions 105994Ssos * are met: 112088Ssos * 1. Redistributions of source code must retain the above copyright 122088Ssos * notice, this list of conditions and the following disclaimer. 132088Ssos * 2. Redistributions in binary form must reproduce the above copyright 142088Ssos * notice, this list of conditions and the following disclaimer in the 1597748Sschweikh * documentation and/or other materials provided with the distribution. 162088Ssos * 4. Neither the name of the University nor the names of its contributors 172088Ssos * may be used to endorse or promote products derived from this software 182088Ssos * without specific prior written permission. 192088Ssos * 202088Ssos * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 212088Ssos * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 222088Ssos * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 232088Ssos * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 242088Ssos * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 252088Ssos * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 262088Ssos * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 272088Ssos * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 2850479Speter * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 292088Ssos * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 302088Ssos * SUCH DAMAGE. 312088Ssos */ 322088Ssos 332088Ssos#if defined(SYSLIBC_SCCS) && !defined(lint) 342088Ssos .asciz "@(#)Ovfork.s 5.1 (Berkeley) 4/23/90" 352088Ssos#endif /* SYSLIBC_SCCS and not lint */ 362088Ssos#include <machine/asm.h> 372088Ssos__FBSDID("$FreeBSD: head/lib/libc/amd64/sys/vfork.S 217106 2011-01-07 16:08:40Z kib $"); 382088Ssos 392088Ssos#include "SYS.h" 402088Ssos 412088Ssos .weak _vfork 422088Ssos .set _vfork,__sys_vfork 432088Ssos .weak vfork 442088Ssos .set vfork,__sys_vfork 452088SsosENTRY(__sys_vfork) 462088Ssos popq %rsi /* fetch return address (%rsi preserved) */ 472088Ssos mov $SYS_vfork,%rax 482088Ssos KERNCALL 492088Ssos jb 1f 502088Ssos jmp *%rsi 512088Ssos1: 522088Ssos pushq %rsi 535994Ssos#ifdef PIC 5432316Syokota movq PIC_GOT(HIDENAME(cerror)),%rdx 5538053Syokota jmp *%rdx 5648105Syokota#else 5754380Syokota jmp HIDENAME(cerror) 5854380Syokota#endif 5954380SyokotaEND(__sys_vfork) 6054380Syokota 6154380Syokota .section .note.GNU-stack,"",%progbits 6254380Syokota